function testWith(bool) {
    print(bool - bool);
    print(bool - false);
    print(false - bool);
    print(false - false);
    
    print(bool - "24");
    print("86" - bool);
    
    print(bool - 4);
    print(4 - bool);
    
    print(null - bool);
    print(bool - null);
    
}

print(true - true);
print(true - false);
print(false - true);
print(false - false);

testWith(true);
testWith(false);

